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DOPAMINE OR MELATONIN OR ".GAMMA.-AMINOBUTYRIC" ACID OR NOREPINEPHRINE OR ACETYLCHOLINE OR HISTAMINE OR LEVODOPA OR TYRAMINE OR TAURINE OR SEROTONIN OR "5-METHOXYTRYPTAMINE" OR PHENETHYLAMINE
- Catecholamine tests check for levels of dopamine, norepinephrine, and epinephrine in urine or blood. High levels can indicate certain types of rare tumors. Learn more.